I have a Riello 40 oil burner on a Buderus boiler. About two weeks ago I noticed that any time the boiler would kick in to heat the water, the Riello would start up into its pre-purge cycle and then when the fire ignited it immediately shut off, the Riello was still humming along and about a couple seconds later it ignited the fire but again the fire immediately shut off, on the third try the fire stayed on. I didn't think anything of it but a few days later I noticed it started to do this on and off thing more and more so that now the burner would go on by the 5th try. In addition, now 2 weeks later sometimes the burn cycle would not heat the water to the upper limit and the up and down process would start happen again until the upper limit was reached. I'm sure that is not good for the system.
Can someone tell me what is causing this. I've looked around and have seen things about the CAD cell or changing out the nozzle both seem doable, but before I start can anyone say for sure what it might be?
Can someone tell me what is causing this. I've looked around and have seen things about the CAD cell or changing out the nozzle both seem doable, but before I start can anyone say for sure what it might be?